Initial commit

rpcsx-os/iodev/zero.cpp

@@ -0,0 +1,32 @@
+#include "io-device.hpp"
+#include <cstring>
+
+struct ZeroDevice : public IoDevice {
+};
+
+struct ZeroInstance : public IoDeviceInstance {
+};
+
+static std::int64_t zero_device_read(IoDeviceInstance *instance, void *data,
+                                     std::uint64_t size) {
+  std::memset(data, 0, size);
+  return size;
+}
+
+static std::int32_t zero_device_open(IoDevice *device,
+                                     orbis::Ref<IoDeviceInstance>  *instance,
+                                     const char *path, std::uint32_t flags,
+                                     std::uint32_t mode) {
+  auto *newInstance = new ZeroInstance{};
+  newInstance->read = zero_device_read;
+
+  io_device_instance_init(device, newInstance);
+  *instance = newInstance;
+  return 0;
+}
+
+IoDevice *createZeroCharacterDevice() {
+  auto *newDevice = new ZeroDevice();
+  newDevice->open = zero_device_open;
+  return newDevice;
+}